Merge pull request #19 from dmb2168/master

Bringing chris_kira_SA up to date with master
added string literal to tree conversion. verification needed
fixes to internal 0degr trees; lrxlib null children fix. added 2nd test failing
added print nulls back in
fixed ordering of children within tree
updated tests to reflect correct ordering
git ignore ignores tmp_lrx files
Merge pull request #20 from dmb2168/chris_kira_semantic_analysis

Fixes to Tree Assignment And Lrx
Merge pull request #21 from dmb2168/chris_kira_semantic_analysis

Declarations no longer allowed in arbitrary blocks
fixed for loop iteration off-by-one; cannot declare variables within blocks now, only at top of functions
get_parent
Added tests for for loop and conditionals
bringing lrxlib.h to compile-able state
escape characters in progress
Merge pull request #22 from dmb2168/chris_kira_semantic_analysis

escape characters in progress
Merge pull request #23 from dmb2168/master

Updating Chris/Kira with Master
escape chars in proper strings now available.

amended lrxlib for string representation
Merge pull request #24 from dmb2168/chris_kira_semantic_analysis

Exscape Characters now available in String Literals
amended escape tester
amended error messages. cleaned spacing